Automatically-threading shuttle



May 4, 1926 H. L, BONNEY AUTOMATICALLY THREADING SHUTTLE Filed Feb. 19, 1925 Patented May 4,1926.

HENRY L. Beltway, UF'NOBZIH Alt-DO ER, ssAcIg sETTs, ssrenon To THE DAVIE-D BROWN COMPANY, dr' LA'wItENoE, ASSACHUSETTS, A ooB'ronMio-iv orivrztss c s'ms.

fiU'fQMATICALU-Y THREADING SHUTTLE T1 T0 callwhom it may] cmem;

This invention re lates to'thztt ola ss of shhtties employed in mito-mhtic'looingwhioh are threaded automatically when is %1"6Shb0bbil'l is placed therein, the threading operationbeiiig partly 'zper'forme'ti on the first pick, after over the bohbin tip, and the'ofjeratio being finished on the limit piGk-Wtfhil the thread is drawn into the s'hiittle eye.

In shuttles of thisohariioter ii' i -the iireslent stage of developme i't there is little or no diflicuity due to unthreac'li ng'e fter the thread has been drawn into the shuttle eye, 'btit practically the whole "di iiioulty ehie to threading arises at the beginningpfthe sec ond pick. This is usi'ially due-either to the fact that the thread is 'not drawn i rito the thread slot past the threzttlretei'n'ing meaiis,

so thatthere is nothing to prevent nnthreeidihgwhen the shutt'le is started on the seeond pick, or to failure offthe thread-retaining means to perform its function under 'afi l oom d'itions. of the threading operation ofteii due :to the fact that, as the bohb'in i's'jthen full, the thread frequently comes off the bo'hbinwery easily and is often so slack "that it is'piaeed under little or no tension, or atleasti-inshflicient tension to draw it into the threa'd is employed, the entrance to the slot beii g often more or less obstructed by defleeting surfaces past which the "thread must "be drawn tobess therein. ='I hat is, while most of theseki evices will threadfproperly' when the thread-is placed under suifioient tension,

is not drawn taut.

IHEIDV of them fail to threadwhen thethread In shuttles of the ahoi e described type now in general use, the threading slot either formed in the n'etaithreading hioe'k of o e side ofthe slot is formed by the'iwo'oci "Hf the shuttie tflhd the other side the Fannie to perform the first stage lines 242 ogt Figure 1;;

zi' iil'iaftitn hieareiriti 19, 1525; Serial n. iof ioe.

151001;, arid withfthe letteritype diiiiouifl ihals been encouiiteredidiie to Tthe closingl off the slot by "reason of the springing of the wood from Lvarious causes, whileiwith "the {other type 'difiioulty is 'fil'lCOilIltBId due to threshage of castings wor -bending 0f the sides of the slot so as to catch the thread 'by' the tightening aetioii of the :screw empl'oye'cl to hold the hlockin position in the shutt1e,.or :to the presence of metal iflefleotiiigl isurfaees which ofier too great obstrtiotion to "the v :passagefof the thread .ihtotheifirst threading Zposition. I I

the ho'bh'ih is inserted, whih oausesthe r thread to he 'drttwnflin l-ine wi'ththe shuttle The oh'jeotslo'f my iiiventidnmatb provitie e11,autoinatleallyithreading shuttle which is f so COnS tiJfiOtdithat t1ie ipreliminary ithrealdv ing, operation, which takes :plac'e during :the

firstYpid wm ;he.:fu'I1y completed under practically all conditionsend eventiif 'the puH ion the thread is iirisuficientito draw it :tzuit or more than to lay it 'into theeiitrance. to y the threading slot, so ihhitt it ii'nay ifall ithere-' iI 1,'.i11tO such a. position itha-t it will ibefposi- ;t11Ve1y -=retaine d 1111"]?0Siiii0f11 tofipeninit the zthreadingoperation .to :he completed on the threading ,slot theftein having wtlzlsgor sides wvhi'ch are rigidly 2116161, so Tthzrtliahility. {that 5 wthe slot wi11 be :close'd ,siiflieient1yto.:catch the thread by yielding of the.shutt1e wood,

hr by the tightening action of the SBQZHTiiIg 'bolt, orffrom other Zea-muses willhe practically V eliminated, slot, past the thread retaining nieanswhioh illustrated in the accompanying drawing in wh.i(':h:. 1 i

Figure lie atop plan View of the thread delivery end portion ,of an automatietlly' threading shuttle embodying .my invention.

thereof a)? Figure 2 is ,etztransverse section Figure '3 'is'a side elevation ther'eoii, i. H Figuretis e side elevation of the threads! with the wohti otthe shuttle in jseetiorll 1 @Eigurt; his f cross seetien at line 5mg of =vide it 'iorm of threitding. bIdCkhaJVi-"ng v a r the bobbin.

Figure 6 is a front end view of the threader.

Figure 7 is a bottom view thereof.

Figure 8 is a sectional view at line 88 of Figure 6.

Figure 9 is a sectional view at line 9-9 of Figure 3. i

Figure 10 is a perspective view of the thread delivery end of the shuttle. V

Figure 11 is a front end View of a slightly modified form of threader.

As shown in the drawing, the shuttle body 10 is provided with the usualchamber 11 in which the bobbin 11' is held, and the slotted side delivery eye 12 and the shuttlewood'in front of said chamber hasa threader-receiving recess therein which opens to the bobbin chamber and to said delivery eye, the longitudinal sides of said recess being parallel to each other and perpendicular to its bottom. The threader 14L consists of a single piece of cast metal the base portion of which is in the form of a rectangular shaped block, which is adaped to fit closely in said recess and to be secured therein by the usual bolt 13. A thread slot 16 is formed in thethreader from end to end thereof, said slot being straight and parallel to the middle longitudinal line of the shuttle and located slightly at one side of said line, and being extended perpendicularly from the top side of the threader and opening into a main thread passagelY, which extends from end to end of the threader' in central alignment with p The slot 16 thus opens into the upper portion of the passage 17 at one side of the middle thereof. As shown in Figs. 5 and 10, a supplemental thread passage 18 is formed between the passage 17 and the top of the threader, in which the thread may be held at the end of the first pick, this constructionbeing employed when the shuttle 1s used for this threads, and a single passage 17 is employed in threader 14 as shown in Fig. 11, when the shuttle is employed for coarse threads. So far as my invention is concerned, it is immaterial whether the 7 single or double thread passage is employed.

A rib portion or bar 20, of somewhat greater thickness than the base portion beneath it, 1s formed integral with the threader. at the opposite side of the thread slot 16 from the shuttle eye, the upper surface of said bar being beveled down to the inner v ertlcal side 21 of the bar, which forms one side ofthe slot, from the top side of the bar, which is at the level of the upper surface of the shuttle, so as to forma thread deflecting surface 20, which decreases in width-as it extends from the rear end of the bar 20 to its front end. The bill 20 projects towards the tip of the shuttle beyond the threader base and abuts with a shoulder 10 on the shuttle. The opposite side of the thread slot from the bar 2Q is formed by one side of a horizontally extending thread retaining finger 22, which extends past the rear portion of a recess 23, and by one side of a beak 24, which extends beyond the threader base and terminates at a substantial distance inthe rear of the front end of the bar 20, so that the thread slot opens to the shuttle recess in front of the tip of the b eak. The top surfaces of the linger 22 and beak 24 decline to the side edges thereof, so that, as the thread is laid thereon, it will be deflected into thethread slot. The top side of the beak is at a substantial distance beneath the level of the top side of the adjacent portion of bar 20. A thread retaining hook 25 depends from the under side of the beak 24 in front of thread passage 17 the front side of the hook 25 extending perpendicularly from the tip end of the beak and one side thereof being continuous with the edge of the beak which forms a portion of a side 'of the slot. Said hook 25 also depends infront of the main thread passage 17, or passage 17 and terminates slightly above the uppermost portion thereof and directly opposite the middle of the supplemental thread passage 18. The other side edge of the beak from its thread slot side is arranged to deflect the thread to the thread eye and the thread retaining hook 26 also depends from said beak to prevent unthreading after the thread has- .eral strains to which a guide thus arranged is sometimes subjected to such an extend as to cause breakagelthereof. 'Thelower end of the guide is flush with the bottom surface of'the threader, and thus bears firmly on the bottom of the shuttle recess at a substantial thread passage 17. I

A transverely concave thread groove 10 is formed in the tip portion of the shuttle which leads from thethreadcr recess directly in front. of the thread passage and extends obliquely to the middle line of the shuttle and terminates close to the metal tip at the end of the shuttle, at which point its middle and deepest portion is at. a substantial distance to one side of said middle line and between said line and the eye side of the shuttle. The side 10 of the rioove meets the shoulder 1O so as to form, for all practical purposes, a continuation. of the face distance below the bottom of the i against the side of the hook, so thatiit will vface of the threader at each side 0 slip down past theend of the hook into the first threading position,

In the formation of the threader the base portion beneath the thread passage is 'made of sufficient strength to hold the side portion, on the top of which the bar or rib por tion 20 is formed, rigidly, so that a strong support for the shuttle wood which engages it is provided and by extending the bar portion beyond the beak the adjacent portion of the wood is likewise rigidly supported, consequently all possibility that the thread slot will be cramped at the side of the beak is avoided and the shuttle wood will be effectively reinforced at these points. 7

v 1. Anautomatically threading shuttle having a bobbin chamber, a slot-ted, side deliv ery eye and a threader recess in the tip portion thereof opening to said chamber and eye, a threader in said recess having a contrally aligned thread passage therethr opening to said chamber and the front end of saidrecess and having a threading slot opening to the top side thereof and to said passage andextending in approximate parallelism with the passage, said threader having faces declining to said slot at each side thereof, providing a vertically unob structed top entrance thereto, whereby the thread may be laid therein throughout its length without deflection as it is drawn from said chamber towards the shuttle tip, a thread retaining hook formed with. the threader and depending at thetip end of said slot and at the side thereof next the shuttle eye, and the tip portion of the shuttle having a thread groove leading from the front end of said recess,the opposite side of said groove from said eye extending obliquely from the'corresponding side of said groove, in effectual continuation thereof, towards the eye side of the shuttle, so that the slot side'of said hook is at one side of a straight line extending from the rear end of the slot to the tip end of the oblique side of said groove.

2. An automatically threading shuttle having a bobbin chamber, a slotted side-dclivcry eye and a threader recess in its tip portion opening to said chamber and eye, a threader in said recess having a thread passage centrally aligned with the shuttle and opening to said chamber and the tip portion of said recess and having a threading slot opening to said passage, said slot being vertically unobstructed and approxi mately straight and parallel to said passage and somewhat offset from the middle of said passage towlards the op osite side of the shuttle from its eye and t e u per surf the slot declining thereto, aid threader having a depending thread-retaininghook at the tip endof the side of said slot next the middle, and the tip portion of the shuttle having a thread groove leading from the front end of said recess and having its opposite side from the eye leading from the front end of the outer side of the slot in effectual continuation thereof and extending obliquely towards the opposite side of the shuttle, to deflect the thread laid in saidslot towards the middle of the passage and beneath said hook.

8. An automatically threading shuttle having a bobbin chamber, a slotted, side dc tance beyond said hook and thread deflect ing faces belng formed on the top side of the threader which decline to said sides at each side,so that the top entrance to the slot is vertically unobstructed, and the tip portion of the shuttle having a thread groove therein the side thereof opposite the eye extending from the adjacent end of the corresponding side of said slot obliquely across the line of said passage, so that when the thread islaid in said slot and in said groove it will be bent at an angle as it is drawn against the side of said hook.

4:. An automatically threading shuttle having a bobbin chamber, a slotted side-deportion thereof opening to said chamber and eye, a threader secured in said recess having a centrally aligned threadpassage there through and a straight threading slot therein to which its top surfaces decline, at each side, to form an imobstructed top entrance thereto throughout its length, said slot be ing extended in approximate parallelism with said passage and opening thereto throughout the length thereof, a longitudinally extending beak formed with the threaderand having a thread-retaining hook depending therefrom at its tip end, one side of said beak and hook forming one side of the tip end portion of said slot, the threaderportion forming the-opposite side of said slot extending longitudinally beyond the tip end of the beak and providing a thread directing surface, and the tip portion or the shuttle havin a thread groeve opening to said recess in with said vlivery eye and a threader recess in the tip sage and extending obliquely-therefrom to one side of the middle line of the shuttle,

' groove.

5. An automatically threading shuttle having a bobbin chamber, a slotted side delivery eyeand athreader recess opening to said chamber and eye, a rigidly formed threader securedin said recess'and having a centrally aligned thread passage there.

through and a straight threading slot leading from the top side thereof to said' passage throughout its length with the top surfaces of the threader decliningito said slot at each side thereof, so that the entrance thereto is vertically unobstructed, a beak formed with the threader'having one side thereof forming one side of said thread slot and having a thread retaining hook depending from its tip end at the end of said side, a bar formed with the threader at the-013 posit-e side of the slot from said beak projecting towards the shuttle tip beyond the tip of the beak and having a thread directing surface forming a portion of the side of the slot, and the tip portion of the shuttle having a shoulder with which the end of said bar abuts and having a thread groove extending obliquely to the center line of the shuttle from said recess at the end of said thread passage to the shuttle tip, one side of said groove extending from the end of said shoulder, in position to form a condirectly thereto and to the top side of the threader so that the top entrance to said slot is vertically unobstructed throughout the length thereof, a beak formed with the threader having a side face extending to its tip end and forming one side of said slot and having a top face declining to said side face, a thread retaining finger depending from the under side of the beak at its tip end, opposite the end of said thread passage, a bar formed with the threader having a side face forming the opposite side of said slot and a top face declining thereto, .said bar being extended towards the shuttle tip b-etending in parallelism with saidpassage and opening thereto and to the top. side of the:

yond' the tip of the beak andthe shuttle tip portion having a shoulder. with which the end of said bar abuts and-having a thread groove extending from said recess in position to receive the thread as it is drawn through said passage over'the shuttle tip, one side of said groove extending from the end of said shoulder obliquely to the side face-of said bar and in substantial continuation' thereof and in position to deflect the thread laterally beneath saidhook as it is drawn into said groove.

7 An automatically threading shuttle having a bobbin chamber, a slotted side-delivery eye, and a threader recess in the tip portion thereof opening to said chamber-and eye, a threader insaid recesshaving a cena trally aligned thread passage and a straight-V sided vertically unobstructedthread slotexthreader throughout the length thereof, a

' beak formed with the threader having a side declining thereto, said bar being extended towards the shuttle'tip beyond the, tip of the'beak and having the top face thereof opposite and beyond the tip .of the beak at a substantially higher elevation than the top surface of the tip of the beak, and the shuttle tip portion'having a thread groove arranged to receive the thread as it is drawn through said passage, one side of which is arranged to form a substantial continuation of the side face of the bar and to extend.

therefrom obliquely towards the opposite side of the shuttle to deflect the thread laterally beneath said hook as it is drawn towards the shuttle tip; i

8. An automatically threading shuttle having a bobbin chamber, a slotted side delivery eye-and a threader recess in its tip portion opening to said chamber and eye, a threader in saidrecess having a thread pasv sage in central alignment witht'he bobbin when in position in said chamber and a strtight thread slot extending vertically from its top side and opening into" said passage from end to end at one side of-the middle thereof, a beak formed with the threader having one side edge forming one side of said slot and having a thread -retaining finger depending fromfitstip end in front of the front end of said passage,

a bar formed with they threader having one side forming the opposite side of said slot, the top surfaces of said beak and bar de clining to said sides to direct the thread into 1 I said slot, and the top portion ofthe shuttle having a transversely concave thread groove opening to said recess in front of said thread passage and extending obliquely towards the shuttle tip, one side of said groove being arranged to extend obliquely from the front end of the side of said bartransversely of the line of said thread passage to deflect the thread laterally beneath said hook as itis drawn through said slot into said groove.

9. An automatically threading shuttle having a bobbin chamber, a slotted side delivery eye and a threader recess in its tip portion opening to said chamber and eye, a threader in said recess havinga centrally aligned thread passage and a straight-sided threading slot, said slot having a vertically unobstructed opening to the top side of the threader throughout the length thereof and extending in parallelism with said passage opposite side of the slot from the beak and the tip portion of the shuttle having a thread groove opening to said recess opposite the front end of said passage and slot .and extending adjacent the tip of the shuttle, said groove having one side thereof forming an effectual continuation of the side of said bar and extending obliquely thereto transversely of the line of said passage,'to deflect the thread beneath said hook as it is drawn into said groove.

In testimony whereof, I have signed my name to this specification.

HENRY L. BONNEY. 

